Permanent magnet all-in-one machine type intelligent fan for motor

Abstract

The invention relates to the field of motor heat dissipation, in particular to a permanent magnet all-in-one intelligent fan for a motor. The permanent magnet all-in-one machine type intelligent fan for the motor comprises a motor body and further comprises the permanent magnet motor installed in the motor body, a first impeller is installed on a main shaft in the permanent magnet motor, or the first impeller is installed through a transmission part, and the main shaft drives the first impeller to rotate so as to accelerate airflow flowing. A fan cover used for wrapping the first impeller is installed at one end of the permanent magnet motor, and an air channel allowing airflow to circulate is formed between the permanent magnet motor and the sealing cover. And the permanent magnet motor is also provided with a temperature sensor close to the three-phase winding and a controller for controlling the rotating speed of the main shaft. According to the permanent magnet all-in-one machine type intelligent fan for the motor, the intelligent fan is adopted in a heat dissipation device, energy can be saved, consumption can be reduced, the permanent magnet motor is low in noise, three-phase winding temperature information is collected and transmitted by the controller, the temperature sensor is short in wiring, and temperature measurement is more accurate.

Description

Technical Field

[0001] The present invention relates to the field of motor heat dissipation, and in particular to a permanent magnet integrated intelligent fan for a motor. Background Art

[0002] The motor generates heat during operation, mainly due to resistance loss, core loss and mechanical loss. If the heat is not dissipated in time, the temperature of the motor will rise, resulting in insulation aging, reduced efficiency and even burning of the motor. Therefore, heat dissipation is an important issue in motor design and operation. To address this, blades installed on the main shaft are generally set inside the motor. During the operation of the motor, the impeller is driven by the main shaft to rotate at high speed, and the air flow is accelerated by the blades, thereby dissipating the heat of the motor in an air-cooled manner.

[0003] For the traditional fan cooling system, its structure is relatively simple, resulting in single functionality, and it cannot be adjusted according to the internal heat level of the motor. That is, the actual heat dissipation may not meet the required heat dissipation standard, or the actual heat dissipation may be much greater than the required heat dissipation standard, resulting in poor heat dissipation effect or energy waste.

[0004] Therefore, it is necessary to provide a new motor-use permanent magnet integrated intelligent fan to solve the above technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a permanent magnet integrated intelligent fan for a motor.

[0006] The permanent magnet integrated intelligent fan for a motor provided by the present invention comprises a motor body, and also comprises a permanent magnet motor installed inside the motor body, a first impeller is installed on the main shaft inside the permanent magnet motor, or the first impeller is installed through a transmission member, and the main shaft is used to drive the first impeller to rotate to accelerate the flow of air, and also comprises:

[0007] A wind cover for covering the first impeller is installed at one end of the permanent magnet motor, and an air duct for air flow is formed between the permanent magnet motor and the cover;

[0008] The permanent magnet motor is also provided with a temperature sensor near the three-phase winding position and a controller for controlling the spindle speed. The temperature sensor is used to measure the temperature change of the three-phase winding, and the information is transmitted to the controller to reasonably adjust the spindle speed according to different temperature ranges.

[0009] A filter screen is arranged at the air inlet position of the air duct, and a cleaning member for cleaning the filter screen is also arranged, and the cleaning member converts the kinetic energy of the air flow into the kinetic energy of its own movement.

[0010] Preferably, the transmission member includes a driving gear fixed on the main shaft, a first transmission shaft is arranged parallel to one side of the main shaft, a driven gear meshing with the driving gear is fixed on the first transmission shaft, the first impeller is fixed on the first transmission shaft, and the first impeller is driven to rotate by gear transmission.

[0011] Preferably, the transmission member includes a driving sprocket fixed on the main shaft, a second transmission shaft is arranged parallel to one side of the main shaft, a driven sprocket is fixed on the second transmission shaft, a transmission chain is meshed between the driving sprocket and the driven sprocket, the first impeller is fixed on the second transmission shaft, and the first impeller is driven to rotate through the sprocket and chain transmission.

[0012] Preferably, the transmission member includes a driving pulley fixed on the main shaft, a third transmission shaft is arranged parallel to one side of the main shaft, a driven pulley is fixed on the third transmission shaft, a transmission belt is connected between the driving pulley and the driven pulley, the first impeller is fixed on the third transmission shaft, and the first impeller is driven to rotate by the pulley and the belt.

[0013] Preferably, in the transmission member, the diameter of the active transmission structure is larger than the diameter of the driven transmission structure, so as to increase the rotation speed of the transmission shaft.

[0014] Preferably, a through opening is provided on the driven transmission structure.

[0015] Preferably, the controller is composed of a PLC and a frequency converter, the PLC processes the temperature signal and controls the output of the frequency converter according to the temperature difference to change the rotation speed of the spindle, and the controller also has an alarm.

[0016] Preferably, the filter is hemispherical and is bolted to the opening of the air duct in the permanent magnet motor, and the convex surface of the filter faces the upstream direction of the airflow.

[0017] Preferably, the cleaning member includes a fourth transmission shaft connected to the filter screen by a bearing, one end of the fourth transmission shaft is fixed by a second impeller, the second impeller converts the impact force generated by the airflow into kinetic energy of its own rotation, and drives the fourth transmission shaft to rotate, and a plurality of annularly distributed arc plates are also fixed on the fourth transmission shaft, one side of the arc plate is provided with bristles that can contact the filter screen, and when the arc plate rotates along with the fourth transmission shaft, impurities attached to the filter screen are scraped off by the bristles.

[0018] Preferably, fins are also provided inside the air duct.

[0019] Compared with the related art, the permanent magnet integrated intelligent fan for motor provided by the present invention has the following advantages:

[0020] Beneficial effects:

[0021] The temperature change of the three-phase winding is directly measured by the temperature sensor, and then the power of the permanent magnet motor is adjusted through the controller, thereby driving the first impeller to rotate to accelerate the airflow and realize the heat dissipation of the motor. This heat dissipation device uses an intelligent fan to save energy and reduce consumption. The permanent magnet motor has low noise. The temperature information of the three-phase winding is collected and transmitted by the controller. The temperature sensor has short wiring and more accurate temperature measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of a preferred embodiment of a permanent magnet integrated intelligent fan for a motor provided by the present invention;

[0023] Figure 2 It is a structural schematic diagram of the assembly of the main shaft and the first impeller shown in the present invention;

[0024] Figure 3 A schematic diagram of the structure of the transmission member and the first impeller assembly shown in the present invention Figure 1 ;

[0025] Figure 4 A schematic diagram of the structure of the transmission member and the first impeller assembly shown in the present invention Figure 2 ;

[0026] Figure 5 A schematic diagram of the structure of the transmission member and the first impeller assembly shown in the present invention Figure 3 ;

[0027] Figure 6 It is a structural schematic diagram of the air duct shown in the present invention;

[0028] Figure 7 It is a schematic structural diagram of the cleaning element shown in the present invention;

[0029] Figure 8 It is a structural schematic diagram of the curved plate shown in the present invention.

[0030] Numbers in the figure: 1. temperature sensor; 2. controller; 3. wind hood; 4. first impeller; 5. permanent magnet motor; 6. main shaft; 7. transmission member; 71. driving gear; 72. driven gear; 73. first transmission shaft; 74. driving sprocket; 75. driven sprocket; 76. transmission chain; 77. second transmission shaft; 78. driving pulley; 79. driven pulley; 710. transmission belt; 711. third transmission shaft; 8. through-port; 9. air duct; 10. filter; 11. cleaning member; 111. fourth transmission shaft; 112. second impeller; 113. curved plate; 114. bristles; 12. fins. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0033] See also Figures 1 to 8 The embodiment of the present invention provides a permanent magnet integrated intelligent fan for a motor, the permanent magnet integrated intelligent fan for a motor includes a motor body, an independent permanent magnet motor 5 is installed in the motor body 1, and the permanent magnet motor 5 is used to drive the first impeller 4 to rotate to accelerate the flow of airflow and realize heat dissipation of the motor body;

[0034] Regarding the installation of the first impeller 4 and the permanent magnet motor 5, the first impeller 4 can be directly installed on the main shaft 6 of the permanent magnet motor 5, and the first impeller 4 can also be installed and driven by a transmission member 7;

[0035] The permanent magnet motor 5 is provided with a wind cover 3, a first impeller 4 is arranged inside the wind cover 3, and an air duct 9 for air flow is formed between the wind cover 3 and the permanent magnet motor 5, which is used for air cooling and heat dissipation of the motor body. Fins 12 are also arranged inside the air duct 9 to improve the heat dissipation effect of the motor body. A filter 10 is arranged at the air inlet position of the air duct 9, and a cleaning member 11 for cleaning the filter 10 is also arranged;

[0036] The permanent magnet motor 5 is also provided with a temperature sensor 1 near the three-phase winding position, and a controller 2 for controlling the rotation speed of the main shaft 6 (the controller 2 is composed of a PLC and a frequency converter, the PLC processes the temperature signal, and controls the output of the frequency converter according to the temperature difference to change the rotation speed of the main shaft 6). The controller 2 has an alarm, and uses the temperature sensor 1 to measure the temperature changes of the three windings, and transmits the information to the controller 2 to reasonably adjust the rotation speed of the main shaft 6 according to different temperature ranges.

[0037] It should be noted that: in the device, an independent heat dissipation system is set inside the motor body to perform targeted heat dissipation treatment on the motor body. The heat dissipation device adopts an intelligent fan to save energy and reduce consumption. The permanent magnet motor 5 has low noise. The temperature information of the three-phase winding is collected and transmitted by the controller 2. The temperature sensor 1 has a short wiring connection, and the temperature measurement is more accurate.

[0038] The following provides the regulation relationship between the heat dissipation device and the actual heat of the motor body:

[0039]

[0040] It can be seen that when the temperature of the three-phase winding is lower than 80°C, the controller 2 adjusts the permanent magnet motor 5 to the shutdown state; when the temperature of the three-phase winding is between 80°C and 100°C, the controller 2 controls the permanent magnet motor 5 to operate at 50% of the rated speed; when the temperature of the three-phase winding is higher than 100°C, the controller 2 controls the permanent magnet motor 5 to operate at full speed. When the motor temperature drops to 100°C, the controller 2 controls the permanent magnet motor 5 to gradually reduce the speed. The controller 2 dynamically adjusts the working speed of the permanent magnet motor 5 according to the real-time temperature of the three-phase winding to maintain the temperature of the three-phase winding at about 100°C; when the temperature of the three-phase winding is higher than 130 degrees Celsius, the alarm sounds;

[0041] The fins 12 arranged inside the air duct 9 and parallel to the air duct 9 can further improve the heat dissipation effect.

[0042] In the embodiments of the present invention, please refer to Figure 3 , Figure 4 and Figure 5 , the transmission member 7 includes at least three types;

[0043] One of them is:

[0044] The transmission member 7 includes a driving gear 71 fixed on the main shaft 6, a first transmission shaft 73 is arranged parallel to one side of the main shaft 6, a driven gear 72 meshing with the driving gear 71 is fixed on the first transmission shaft 73, and the first impeller 4 is fixed on the first transmission shaft 73, and the first impeller 4 is driven to rotate through gear transmission;

[0045] The second is:

[0046] The transmission member 7 includes a driving sprocket 74 fixed on the main shaft 6, a second transmission shaft 77 is arranged parallel to one side of the main shaft 6, a driven sprocket 75 is fixed on the second transmission shaft 77, a transmission chain 76 is meshed between the driving sprocket 74 and the driven sprocket 75, and the first impeller 4 is fixed on the second transmission shaft 77, and the first impeller 4 is driven to rotate through the sprocket and chain transmission;

[0047] The third is:

[0048] The transmission member 7 includes a driving pulley 78 fixed on the main shaft 6, a third transmission shaft 711 is arranged parallel to one side of the main shaft 6, a driven pulley 79 is fixed on the third transmission shaft 711, a transmission belt 710 is connected between the driving pulley 78 and the driven pulley 79, and the first impeller 4 is fixed on the third transmission shaft 711, and the first impeller 4 is driven to rotate by the pulley and the belt;

[0049] In the transmission member 7, the diameter of the active transmission structure is larger than that of the passive transmission structure, so as to increase the rotation speed of the transmission shaft. Meanwhile, a through opening 8 is provided on the passive transmission structure.

[0050] It should be noted that the first impeller 4 can be directly mounted on the main shaft 6 of the permanent magnet motor 5, or can be mounted and driven through the transmission member 7, both of which have their own advantages and disadvantages, and the specific choice depends on the actual use situation;

[0051] When the transmission member 7 is used to install and drive the first impeller 4, the transmission member 7 can be a gear transmission structure, a sprocket chain transmission structure, and a pulley transmission structure, all of which can achieve the installation and driving of the first impeller 4;

[0052] For the transmission member 7 recorded therein, gear transmission is the main one. Gear transmission has high mechanical efficiency and requires proper lubrication and maintenance. Gear transmission can be designed to be more compact and small, which is suitable for large torque transmission occasions.

[0053] For the transmission member 7 described in the second embodiment, the sprocket chain transmission is mainly used. The chain transmission can be used for transmission over a longer distance and has higher flexibility. At the same time, the maintenance and replacement of the chain are relatively convenient.

[0054] For the transmission member 7 described in the third embodiment, the pulley transmission is mainly adopted, and the pulley transmission can buffer the load impact and reduce the transmission of vibration. At the same time, the belt is relatively simple to replace, which is convenient for later maintenance. At the same time, the belt has the function of overload protection;

[0055] In this regard, if high efficiency and compact design are required, gear drive may be the best choice. If buffering and vibration reduction are required, or the installation space is limited, belt drive may be a better choice. If long-distance transmission and simple maintenance are required, chain drive may be a suitable choice.

[0056] It should also be noted that: in the transmission member 7, the driving gear 71, the driving sprocket 74 and the driving pulley 78 are all active transmission structures, while the driven gear 72, the driven sprocket 75 and the driven pulley 79 are all driven transmission structures. The diameter of the driven transmission structure is smaller than that of the active transmission structure, which has the effect of speeding up, so that the transmission shaft on which the first impeller 4 is installed rotates faster, and the airflow velocity used for cooling is faster;

[0057] A through hole 8 is provided on the driven transmission structure, which can increase the airflow flow and help improve the heat dissipation effect, especially when the driven transmission structure rotates at high speed, the airflow can take away more heat; at the same time, the through hole 8 can reduce the resistance of gas flow and make the airflow smoother.

[0058] In the embodiments of the present invention, please refer to Figure 6 , Figure 7 and Figure 8 The filter screen 10 is hemispherical and is bolted to the opening of the air duct 9 in the permanent magnet motor 5, and the convex surface of the filter screen 10 faces the upstream direction of the airflow;

[0059] The cleaning member 11 includes a fourth transmission shaft 111 connected to the filter 10 by a bearing, one end of the fourth transmission shaft 111 is fixed by a second impeller 112, the second impeller 112 converts the impact force generated by the airflow into the kinetic energy of its own rotation, and drives the fourth transmission shaft 111 to rotate, and a plurality of annularly distributed arc plates 113 are fixed to the fourth transmission shaft 111, and bristles 114 that can contact the filter 10 are provided on one side of the arc plate 113. When the arc plate 113 rotates along with the fourth transmission shaft 111, impurities attached to the filter 10 are scraped off by the bristles 114.

[0060] It should be noted that: a filter 10 is arranged at the air inlet of the air duct 9, and the filter 10 is used to intercept impurities, so as to prevent impurities from entering the air duct 9 and prevent dust from accumulating on the fins 12, so as to ensure the normal heat dissipation processing of the entire heat dissipation device. At the same time, the filter 10 is in a three-dimensional shape, which is more convenient for subsequent cleaning compared with a two-dimensional filtering structure;

[0061] In the cleaning member 11, the fourth transmission shaft 111 is installed on the filter 10, and the second impeller 112 is arranged thereon. When the first impeller 4 pushes the airflow to flow rapidly, the airflow directly acts on the second impeller 112, and the second impeller 112 converts the kinetic energy of the airflow into the kinetic energy of its own rotation. When rotating, the fourth transmission shaft 111 drives the arc plate 113 to rotate, so that the filter 10 is cleaned by the bristles 114.

[0062] At the same time, the fourth transmission shaft 111 is installed on the filter 10 through a bearing, and the friction during the rotation process will be lower, which is conducive to the rotation of the fourth transmission shaft 111. At the same time, the heat generated during the rotation process will be relatively small, and will not have a direct impact on the motor body.

[0063] The specific usage process of the device is as follows:

[0064] The temperature sensor 1 is installed in the three-phase winding to measure the temperature in the three-phase winding in real time. The detected temperature information is transmitted to the PLC in the controller 2, and the frequency converter is controlled by the PLC to adjust the speed of the permanent magnet motor 5.

[0065] The specific adjustment is determined according to the temperature information, that is, when the three-phase winding temperature is lower than 80°C, the controller 2 adjusts the permanent magnet motor 5 to the shutdown state; when the three-phase winding temperature is between 80°C and 100°C, the controller 2 controls the permanent magnet motor 5 to operate at 50% of the rated speed; when the three-phase winding temperature is higher than 100°C, the controller 2 controls the permanent magnet motor 5 to operate at full speed. When the motor temperature drops to 100°C, the controller 2 controls the permanent magnet motor 5 to gradually reduce the speed. The controller 2 dynamically adjusts the working speed of the permanent magnet motor 5 according to the real-time temperature of the three-phase winding to maintain the three-phase winding temperature at around 100°C; when the three-phase winding temperature is higher than 130 degrees Celsius, the alarm sounds.

[0066] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A permanent magnet integrated intelligent fan for a motor, comprising a motor body, and a permanent magnet motor (5) installed inside the motor body, wherein a first impeller (4) is installed on a main shaft (6) inside the permanent magnet motor (5), or the first impeller (4) is installed through a transmission member (7), and the main shaft (6) drives the first impeller (4) to rotate to accelerate the flow of air, characterized in that: Also includes: A wind cover (3) for covering the first impeller (4) is installed at one end of the permanent magnet motor (5), and an air duct (9) for air flow is formed between the permanent magnet motor (5) and the cover (3); The permanent magnet motor (5) is also provided with a temperature sensor (1) near the three-phase winding position and a controller (2) for controlling the rotation speed of the main shaft (6). The temperature sensor (1) is used to measure the temperature change of the three-phase winding, and the information is transmitted to the controller (2) to reasonably adjust the rotation speed of the main shaft (6) according to different temperature ranges. A filter screen (10) is arranged at the air inlet of the air duct (9), and a cleaning member (11) for cleaning the filter screen (10) is also arranged, and the cleaning member (11) converts the kinetic energy of the airflow into the kinetic energy of its own movement.

2. The permanent magnet integrated intelligent fan for motor according to claim 1, characterized in that: The transmission member (7) comprises a driving gear (71) fixed on the main shaft (6); a first transmission shaft (73) is arranged parallel to one side of the main shaft (6); a driven gear (72) meshingly connected with the driving gear (71) is fixed on the first transmission shaft (73); the first impeller (4) is fixed on the first transmission shaft (73), and the first impeller (4) is driven to rotate through gear transmission.

3. The permanent magnet integrated intelligent fan for motor according to claim 2, characterized in that: The transmission member (7) comprises a driving sprocket (74) fixed on the main shaft (6); a second transmission shaft (77) is arranged parallel to one side of the main shaft (6); a driven sprocket (75) is fixed on the second transmission shaft (77); a transmission chain (76) is meshed between the driving sprocket (74) and the driven sprocket (75); the first impeller (4) is fixed on the second transmission shaft (77); and the first impeller (4) is driven to rotate through the sprocket and chain transmission.

4. The permanent magnet integrated intelligent fan for motor according to claim 3, characterized in that: The transmission member (7) comprises a driving pulley (78) fixed on the main shaft (6); a third transmission shaft (711) is arranged parallel to one side of the main shaft (6); a driven pulley (79) is fixed on the third transmission shaft (711); a transmission belt (710) is connected between the driving pulley (78) and the driven pulley (79); the first impeller (4) is fixed on the third transmission shaft (711); and the first impeller (4) is driven to rotate by the pulley and the belt.

5. The permanent magnet integrated intelligent fan for motor according to claim 4, characterized in that: In the transmission member (7), the diameter of the active transmission structure is greater than the diameter of the passive transmission structure, so as to increase the rotation speed of the transmission shaft.

6. The permanent magnet integrated intelligent fan for motor according to claim 5, characterized in that: A through opening (8) is provided on the driven transmission structure.

7. The permanent magnet integrated intelligent fan for motor according to claim 1, characterized in that: The controller (2) is composed of a PLC and a frequency converter. The PLC processes the temperature signal and controls the output of the frequency converter according to the temperature difference to change the rotation speed of the main shaft (6). The controller (2) also has an alarm.

8. The permanent magnet integrated intelligent fan for motor according to claim 1, characterized in that: The filter screen (10) is hemispherical and is bolted to the opening of the air duct (9) in the permanent magnet motor (5), with the convex surface of the filter screen (10) facing the upstream direction of the airflow.

9. The permanent magnet integrated intelligent fan for motor according to claim 1, characterized in that: The cleaning member (11) comprises a fourth transmission shaft (111) connected to the filter screen (10) by a bearing, one end of the fourth transmission shaft (111) being fixed by a second impeller (112), the second impeller (112) converting the impact force generated by the airflow into its own rotational kinetic energy, and driving the fourth transmission shaft (111) to rotate, a plurality of annularly distributed arc plates (113) being fixed to the fourth transmission shaft (111), one side of the arc plate (113) being provided with bristles (114) capable of contacting the filter screen (10), and when the arc plate (113) rotates along with the fourth transmission shaft (111), impurities attached to the filter screen (10) are scraped off by the bristles (114).

10. The permanent magnet integrated intelligent fan for motor according to claim 8, characterized in that: Fins (12) are also arranged inside the air duct (9).

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